package jdbc;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

/**
 * 用户登录功能
 *
 *
 */
public class LoginDemo {


    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户名：");
        String username = scanner.nextLine();
        System.out.println("请输入密码");
        String password = scanner.nextLine();
        try (Connection connection = DBUtil.getConnection()){
            Statement statement = connection.createStatement();

            String sql = "SELECT id,username,password,nickname,age " +
                    "FROM user " +
                    "WHERE username ='"+username+"' AND password = '"+password+"' ";
            ResultSet rs = statement.executeQuery(sql);
            if(rs.next()){
                System.out.println("登录成功,欢迎你:"+rs.getString("nickname"));
            }else{
                System.out.println("登录失败,用户名或密码不正确");
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }
}
